Will Venable and Jedd Gyorko are having the August that Chase Headley had last season.

Venable homered deep into the right field seats with one out in the seventh inning Friday night at Petco Park to break a 6-6 tie and lead the Padres to an 8-6 victory over the Chicago Cubs.

An inning later, Jedd Gyorko hit his second homer of the game as the Padres overcame a six-run deficit -- their biggest deficit of the season and their largest at Petco Park since July 31, 2009.

Venable’s 18th homer of the season capped a comeback after the Cubs had scored six runs in the first off Padres starter Edinson Volquez.

The Padres, however, charged back behind Gyorko and Venable.

Gyorko was 3-for-4 with two homers and four RBIs. Venable was 3-for-4 with a homer and a triple for three RBIs and two runs scored.

The Padres rallied against Edwin Jackson with three runs in the fourth, two in the fifth and one in the sixth – tying the game on Logan Forsythe’s two-out triple following a one-out double by Chase Headley.

In the fourth, Gyorko followed singles by Venable and Yonder Alonso with his 15th homer of the season to halve the six-run deficit. The two home runs give the second baseman eight in August – the most ever by a Padre rookie in any calendar month.

An inning later, Venable hit a booming triple to the base of the fence in right center to drive in two runs.

Venable’s tie-breaking homer off Cubs’ left-handed reliever James Russell traveled 441 feet and landed in the third tier of seats in right field. It was the longest home run by a Padre this season and the second-longest of the year at Petco Park.

The home run was Venable’s fifth in the last 14 games, his fourth straight against a left-handed pitcher and his sixth of the season against left-handers. He entered the season with only three homers in his career against left-handed pitchers.

Gyorko and Venable have combined for 14 homers this month.

Venable has hit safely in 18 of his 19 games this month and is batting .364 (28-for-77) with five doubles, three triples, six home runs and five stolen bases for 11 RBIs and 15 runs scored.

Gyorko is hitting .265 (18-for-68) in August with four doubles plus the eight home runs for 15 RBIs. Gyorko’s last 14 RBIs have come via the home run, one shy of the club record set by Rondell White in 2003.

“Venable has a lot of momentum, a lot of confidence” said Padres manager Bud Black. “He’s swinging great. Will’s really been conscious of hanging in against left-handers. When they make mistakes, he’s swinging, he’s not taking them. And he’s squaring them up.

“There’s no doubt that Gyorko scuffled after his (groin) injury. But we’ve said all along this guy is a hitter and a ballplayer. Right now we’re seeing the power emerge. He’s starting to make the adjustment back.”

While Black praised Gyorko and Venable, he credited the bullpen for the win.